Pressure adjustment for box-staying machines and the like.



E. M. HAWKINS & 0. IVI. HOCH.

kPRESSURE ADJUSTMENT FOR BOX STAYING MACHINES AND THE LIKE.

APPLICATION FILED SEPT. 15, 1916.

1,272,802. Patented July-16, 1918.`

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- E. M. HAWKlNS & 0. M. HOCH. PRESSURE ADJUSTMENT FOR BOX STAYINGMACHINES ANDfl-HE LIKE. APPLICATION FILED sEPT.15,191s-.

l ,272,802. Patented my 16, 1918.

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EDGAR M. HAWKINS AND OTTO M. HOCH, oriaoorrnsrnaivnw YORK, AssIfGrNoRsTo'A IVI. D. KNOWLTON COMlANY, QF ROCHESTER, 55055K, A CORPORATION OFNEW YORK.

PRESSURE ADJUSTMENT FORBOX-STAYING; MACHINES THE LIKE.

Specication of Letters'latent.

' Application led September 15, 1916. Serial No. 120,293.

To all whom it 'may concern Be it known that we, EDGAR M. HAW'KINS andOTTO M. HOCH, citizens of the United States, and vresidents ofRochester, in the county 0f Monroe and State of New York, have inventedcertain new and usefull Tmprovements in Pressure Adjustments forBox-Staying Machines and the like, of which the following is aspecification.

The present invention relates to a, pressure adjustment for presses,punching machines, box-staying machines and similar machines wherein areciprocating actuating part is used and wherein the power istransmitted through said actuating part to the work-performing elementonly when the latter is in close' proximity tothe work to be operatedupon.

The main object of this invention' resides the provision-,of means forvarying the effective length of the actuating means for thevwork-performing element in machines of the'type above referredto,whereby the pressurey exerted upon the work may be varied at the willof the operator.

In carrying out'the object of this invention, means is providedy toconnect the reciprocating slide which carries the movablework-performing element, tothe collapsible link which connects the saidslide to the power transmission means or shaft, in such manner that thedistance between the point of connection between thek actuating elementand slide and the point where ythe power is transmitted to theyactuating element may be varied. Furthermore, provision is made for thisadjustment in such manner that the pressure-adjusting means for thetucker knife, when the invention is incorporated ina box stayer, willnot be interfered with in any way. Other features Vand advantages, ofthe invention willl be referred toin the detailed description of theinvention which follows.

One embodiment of our invention is illus'- trated inthe drawings, inwhich:-l

Figure 1 is a` front elevation of a box stayer having the inventionapplied thereto;

Fig. 2 is a side'elevation of a portion of the stayer; and

Fi 3 is a fragmental detail sectional view showing the manner in whichthe adjusting pin is constructed and mounted.

The drawings illustrate a box stayer which includesY broadly, a frame1', a stationary die' 2 and a movable die 3, which latter is carried bya suitable slide 4. Mounted in the upper portion of the frame 1 is apower transmission shaft 5. The actuating means for the movable die 3,which takes the form of a pitman extending between the' powertransmission shaft and the slide 4, comprises van element 6 whichissecured to they end of the shaft 5, eccentrically, by suitable means 7.Thiselement 6 is provided with a shoulder 8 whichl coperates with asimilar shoulder 9 onY a second transmission element O, which latter ispivot'ally and slidably connected tothe eleinent 6 by meansof a pin 1 1and is provided at its upper endY with a linger 12 which is arrangedy tobe wiped by a cam 13, on the transmission shaft 5. The pinrll issecuredy to the element 6 and extend'sinto a slot 14k' in the element10, and onthis pin is mounted a spring 15 which continuously bearsYagainst thezelement 10 and normally .tends to.l move theY shouldersV 8"Vand' 9 on the respective'elements l6 and 10 into engagement with eachother,but permits the disengagement of said shoulders whenthe' cam 13wipes'the finger 12 on the element 10. The transmission element 6extends downwardly from its point of. connection with the shaft 5, andrat its lower end has an elon gated longitudinally extending slot 16through which extends a pin which includes a member' 17. This pin memberisv rotatably mounted on the movable die Siny a lug 18thereo'n'.Extending through the lug 18 and into acircumferential groove 2() in thepin member 17, isy screw 21 which prevents the longitudinal movementofthe pin member with respect to the movable die. The diameter of theportion of the-pin member 17 which is ,located within the slot 16 invthe element 6, is less than the length of the slot, sothat the element 6may move with respect to the pin member without imparting movement tothemovable die 3. The 'second' transmission element 10 is provided, at itslower end, with a circular opening yhaving a bushing' 22 therein,through which bushing the pin member 17 extends. This pin member 17 isprovided with an eccentric trunnion23 which projects rearwardly from thevelement 10, but which is coaxial with the portion ofthe pin memberwhich is located within the lug 18.v This trunnion 23 is revolubl'ymount-cul inA a second piu member 24,.

Patented July 16,1918."

which, together `with the member 17, forms the pin connection betweenthe slide 4c and Y block 26 which extends rearwardly from the slide forthe accommodation of the adjusting means for regulatingv the pressure ofthe tucker knife 30, movably mounted on the rear end of the die 3 forvertical movement therewith. A threaded stem 30', extending upwardlyfrom this knife through an opening in the block 26, carries a pressurespring 29 which expands between the under side of the block 26 and theknife 30 for exerting downward pressureon the latter, and also carriesabove the block 26 an adjusting sleeve 27 and a clamp nut 28 therefor,the said sleeve being operative to adjust the pressure of the spring 29in usual manner.

AFormed on the forward end ofthe pin l member .17 is a notched wheel 31having a nut 31 cast thereon by means of which the pin member 17 may berotated. This pin member 17 is held in its various adjusted positions bymeans of a two-pointed pawl 32 which is normally pressed into engagementwith the notched wheel 31 by a flat spring 33.

Thus when the movable die 3 is descending, the cam 13 will maintaintheshoulders 8 vand 9 of the elements 6 and 10 in disengaged relation,but when the die nears the completion of its stroke and is about toapply pressure tothe work, the cam 13 is rendered ineffective and thespring 15` operates to rengage the shouldersl 8 and 9, so that thefurtherdownward movementof the die will cause pressure to be exertedupon the work, as there will be a direct connection between lthetransmission shaft 5 and the die. However, if resistance is offered tothe movable die in its downward movement-as by the presence of theoperators hand between the dies-before the cam 13 disengages the finger12, the spring 15 will be inoperative to rengage the shoulders 8 and 9,and, consequently, the subsequent rotation of the transmission shaftwill result vin no direct pressure upon 4the movable die 3. Undery theseconditions, the only pressure exerted by the die will be that exertedbythe weight of the die itself and its connected parts, and this isovercome in the present case by means of a suitable spring 311, which isattached to the 'yoke 36 and to an upper portion of the frame 1 bysuitable adjustable means 35.

When yit is desired to vary the pressure which the movable dies. exertsVupon the work, the pawl 32V is disengaged vfrom the. notched wheel 31andthe pin member 17 is rotated in the proper direction, that is to say,to cause its eccentric portion, which is located vbetween the lug 18 andthe trunnion l23, to force the element 10 either upwardly or downwardly.This adjustment of the pin member 17 will vary the effective length ofthe actuating means for the movable vdie which includes thel elements 6and 10.

Thus the invention provides, in a machine where a safety device such asdescribed in the present application is used', means for varying thepressure exerted by the workperforming element and provides specificallya composite pin which connects theV die-carrying slide of thebox-stayer, which is illustrated in the present drawings, to the dieactuating element or pitman. The composite pin, as described, comprisesarotatable member and a member stationary with the die-carryingslide,which latter member supports the adjustment means for the tucker knife,and it is, therefore, essential that this member be held stationary withrespect to the slide and the said adjustment means, e

What we claim is:-

1. In a' box staying machine, a rotary actuating part, a reciprocatingslide carrying a presser die and a cut-off knife, a pitman connectionbetween said actuating part and the slide, means connecting the pitmanto the slide including an eccentric pin member rotatably connected withthe pitmanv and a second pin member rigidly connected with the slide androtatably supporting the eccentric pin member, means for maintaining theeccentric pin memberin adjustedposition, and adjusting means for-thecut-0H knife supported by said second pin member.

2. In a boxV staying machine, a .rotary actuating part, a reciprocatingslide carrying a presser die, a pitman connection between said actuatingpart and the slide, means connectingl the pitman to the slide includingan eccentric pin member'rotatably connected with the pitman and a secondpin member rigidly connected with the slide and'rotataperforming elementmovable with the slide and having connection with the said second pinmember. f n 3. In a box staying machine, a rotary actuating part, areciprocating slide carrying a presser die, a pitman connection betweensaid actuating part and the slide, means connecting the pitman to theslide including an eccentric pin member rotatably connected with thepitman and aysecond pin member rigidly connected with the slide androtatably supporting the eccentric'pin member, means for maintaining theeccentric vpin member in adjusted position, and a cut-olf knife movablewith the slide and having connection with said second pin member. I

4. In a box staying machine, a -rotary actuating part, a reciprocatingslide carrying a presser die and a cut-oft1 knife, a collapsible pitmanconnection between said actuating part and the slide, means connectingthe pitl'nan to the slide including an eccentric pin member rotatablyconnected with the pitlnan and a second pin member rigidly con'- nectedwith the slide and rotatably supporting the eccentric pin member, meansfor maintaining the eccentric pin member in adjusted position, andadjusting means for the cut-olf knife supported by said second pinmember.

5. In a machine of the class described, the combination with a rotarypower transmission element and a reciprocating Workperforming element,of a collapsible pit-man extending between the same, the said pitmanincluding an element connected to the transmission element, an elementconnected to the work-performing element, and means for causing thepositive engagement of said pitnan elements, and means for Varying thepoint of connection between the work-pen forming element and the pitmanelement connected thereto. A

G. In a machine of the class described, the

Copies of this patentmay be obtained for combination with a rotary powertransmission element and a reciprocating work-performing element, of acollapsible pitman eX- tending between the same, the said pitmanincluding an element connected to the transmission element, an elementconnected to the work-performing element, and means for causing theengagement and disengagement of said pitman elements, and means forvarying the point of connection between the work-performing element andthe pitman element connected thereto including an eccentric pin membercarried with the workperforming element and rotatably connected with thepitman.

Signed at Rochester, in the county of Monroe, and State oi' New York,this 12th day of September, A. D. 1916.

EDGAR M. HAWKIN S. OTTO M. HOCH.

Witnesses:

THos. D. PATTON, Ro'r. J. GARRIsoN.

iiie cents each, by addressing the Commissioner of Patents,

Washington, D. C.

